Windows 11 - External Display - laptop reverts to internal display when resuming from sleep

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Occasional Visitor

I use an Dell UltraSharp 38 monitor connected to my laptop in extended desktop mode.  When I wake the laptop up from sleep, it reverts to "PC screen only".  It does not does not stay in Extended Desktop, despite it being selected in Settings ([Windows] + P also show "Extend" being selected (see attached)).  I can only get "Extend" to work again by selecting something other than "Extend" and then selecting "Extend" again.  I have updated to the latest display adapter and monitor drivers and for some reason I don't have this problem when it boots and it did not happen in Windows 10.  

 

Here is my PC Setup:

HP Spectre x360 Convertible
Processor Intel(R) Core(TM) i7-1065G7 CPU @ 1.30GHz 1.50 GHz
Installed RAM 16.0 GB (15.7 GB usable)
Edition Windows 11 Home
Version 21H2
Installed on ‎10/‎7/‎2021
OS build 22000.258
Experience Windows Feature Experience Pack 1000.22000.258.0

 

Dell UltraSharp 38 Monitor => DP => DP 1.4 Bi-Directional Switch => DP => CalDigit Thunderbolt Station 3 Plus => TB => Spectre Thunderbolt 3 Port

 

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